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根據百分率找數量（二）: 例4
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
New Resources
拼砌四邊形
Nested spiral octagon
兩組對邊相等和有直角的四邊形
近似值：有效數字
判斷球體
Discover Resources
Escher 階梯 (Penrose Stair)
認識圓
MFS Pyth Thm 1
放射狀旋轉圖形(1)
Reuleaux triangle 掃地機器人v1.0
Discover Topics
Scalene Triangles
Trapezium
Incircle or Inscribed Circle
Bar Chart or Bar Graph
Means